Battery charger



FIG. 1 is a top, right, front perspective view of a battery charger;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawings depict portions of the battery chargerthat form no part of the claimed design.

CLAIM We claim the ornamental design for a battery charger, as shown anddescribed.